Mobx Session

Mobx Session helps you manage your session data providing an API to save and access your info whenever and wherever you want.

The stored data will be saved with localforage.

Installation

yarn:

yarn add mobx-session

npm:

npm install mobx-session

Usage

It's really straight forward to use.

First you must initialize the Storage. For that, you should call

import SessionStore from 'mobx-session';
 
SessionStore.initialize();

This should be called before any other method call, so I would recommend putting it on the index.js or App of your site, or in the top of another Store that uses SessionStore (like in this example).

There are several config options to customize this method, go to the API doc to see more.

For example

import SessionStore from 'mobx-session';
 
SessionStore.initialize({ name: 'my-app-name' });

Then, you can use it wherever you want.

Inside a Component

import SessionStore from 'mobx-session';
 
const MyComponent = observer(() => {
  if (SessionStore.initialized) {
    return (
      <div>
        {
          SessionStore.hasSession
          ? <p>Hello!</p>
          : <p>Login</p>
        }
      </div>
    );
  }
 
  return null;
})

You can use the decorator syntax

import SessionStore from 'mobx-session';
 
@observer
const MyComponent = () => {
  if (SessionStore.initialized) {
    return (
      <div>
        {
          SessionStore.hasSession
          ? <p>Hello!</p>
          : <p>Login</p>
        }
      </div>
    );
  }
 
  return null;
}

TIP: don't forget to make your component an observer so you don't lose the reference.

Inside a Store

import SessionStore from 'mobx-session';
 
class UserStore {
  constructor() {
    extendObservable(this, {
      user: null,
      get loggedIn() {
        return this.user !== null && SessionStore.hasSession;
      },
    });
  }
  ......
}

You can also use the decorator syntax

import SessionStore from 'mobx-session';
 
class UserStore {
    @observable user = null;
    @computed get loggedIn() {
        return this.user !== null && SessionStore.hasSession;
    }
    ......
}

TIP: inside a store, don't forget to use it inside a computed value or an auto-run so you don't loose the reference.

Examples

• Basic example using React
• Example using React and React Router v4 that uses the session data to determine if a user can access a private route.

API

initialize(config: object): Promise

Initialize an instance of the storage inside the session.

Options can be the ones listed in the localforage library

saveSession(session: object): Promise

Saves the session object in the store and storage

deleteSession(): Promise

Deletes the session object from the store and the storage

getSession(): Promise(session: object)

Returns the session object saved if there's any

initialized: boolean

Returns true if the session store has been initialized. Could be useful to check this property before relying on other methods or properties from the store.

hasSession: boolean

Returns true if there's a session object saved and false if there's not.

Contributing

Bug reports (please use Issues) and pull requests are welcome on GitHub at https://github.com/rootstrap/mobx-session. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The library is available as open source under the terms of the MIT License.

Credits

mobx-session is maintained by Rootstrap with the help of our contributors.